Hi There,
I think this is a specific bug associated with Mac - this should be ironed out in the newest bug-fix release that will be released in the next few days. IIf you need to get something up and running sooner, please could you see if you still get this error if you install a prior version of PsychoPy? 2021.1.4 ? (Releases · psychopy/psychopy · GitHub)
Thanks!
Becca